ABB Relion 670 Series Commissioning Manual page 164

Section 11
Testing functionality by secondary injection
Ensure that the maximum continuous current, supplied from the current source used for the test
of the IED, does not exceed four times the rated current value of the IED.
11.5.1.1 Measuring the trip limit of set values
1. Set the operation mode to
2. Inject a phase current into the IED with an initial value below the set value of
make sure that the set value
3. Increase the injected current in the Ln phase until the TR_A (TR_B or TR_C) signal appears.
4. Switch the fault current off.
5. Compare the measured operating current with the set value.
6. Set the operation mode to
that no TRLn signal appears.
11.5.1.2 Completing the test
continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.5.2 Directional phase overcurrent protection, four steps OC4PTOC
(51_67)
Prepare the IED for verification of settings outlined in Section
settings".
Values of the logical signals for OC4PTOC are available on the local HMI under Main menu/Tests/
Function status/Current protection/PhaseOverCurrent4Step(51_67,4(3I>))/
OC4PTOC(51_67;4(3I>)):x, where x = instance number.
The Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.
11.5.2.1 Verifying the settings
1. Connect the test set for current injection to the appropriate IED phases.
If there is any configuration logic that is used to enable or block any of the four available
overcurrent steps, make sure that the step under test is enabled (for example, end fault
protection).
158
1 out of 3 .
IP>> is in between IP>>Min and IP>>Max .
Observe: Do not exceed the maximum permitted overloading of the current
circuits in the IED.
2 out of 3 and inject current into one of the phases and then check
The verification of the non-directional phase overcurrent function is done as
instructed below, but without applying any polarizing voltage.
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1MRK 506 371-UUS E
IP>> and also
TESTMODE setting to Disabled .
"Preparing the IED to verify
Line distance protection REL670
Commissioning manual
M11754-11 v7
M11754-24 v5
SEMOD56287-67 v9
SEMOD56287-72 v10